Equilibrium potential (K+, animal cell)

Submitted by Juli Uhl on

The figure shows an animal cell with the following labeled:
● Potassium (K+) ion concentrations (measured in mM) inside and outside the animal cell
● Membrane potential (-70 mV)
● K+ channel

a) In this situation, there is net movement of K+ ions out of the animal cell through the K+ channel (as indicated by the arrow). What would have to change to cause net movement of K+ INTO the animal cell? Identify as many ways as you can.

b) Explain how the ways you identified above cause K+ to move INTO the animal cell.

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This material is based upon work supported by the National Science Foundation (DUE grants: 1438739, 1323162, 1347740, 0736952 and 1022653). Any opinions, findings and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the NSF.